//
//  NSString+JYJSHA.m
//  24_加密
//
//  Created by 冀永金 on 16/8/16.
//  Copyright © 2016年 KX. All rights reserved.
//

#import "NSString+JYJSHA.h"
#import <CommonCrypto/CommonCrypto.h>
@implementation NSString (JYJSHA)
- (NSString *)stringWithSHA_1{
    // 将字符串装换成C
    const char *cString = [self UTF8String];
    // 求长度
    CC_LONG len = (CC_LONG)strlen(cString);
    
    unsigned char bytes[CC_SHA1_DIGEST_LENGTH];
    CC_SHA1(cString,len,bytes);
    // SHA1 转换
    NSMutableString *finalSHA1 = [NSMutableString stringWithCapacity:CC_SHA1_DIGEST_LENGTH];
    for (int i = 0; i <CC_SHA1_DIGEST_LENGTH; i++) {
        [finalSHA1 appendFormat:@"%02x",bytes[i]];
    }
    return finalSHA1;
}
@end
